Femoral stem fracture is one of the common fractures in children and has its unique characteristics: 1. Strong growth and healing ability in children, which can form abundant bone scabs early to achieve strong healing. 2. Strong natural orthopedic ability 3. Fast healing and good prognosis. It is generally thought that if good force line and length can be maintained after fracture, minor shortening or rotational deformity can be corrected at the age of growth, and for children with femoral stem fracture any plane of deformity healing not more than 25 degrees will be self-corrected and sufficient to restore the force line of joint surface. The simplest way to obtain satisfactory results for femoral stem fractures in children is the best way, and the choice of treatment should be determined by the child’s age, skin, soft tissue condition, fracture plane, displacement, and the presence or absence of compound injuries. The traditional treatment of femoral stem fractures in children has been pavlik sling, skin suspension traction, plaster fixation after manipulation, tibial or femoral traction repositioning with plaster fixation, and incisional repositioning plate internal fixation. Each of these treatment methods has its own indications and advantages and disadvantages. In recent years, people gradually prefer surgical internal fixation for the treatment of femoral stem fractures in children, and new internal fixation materials are constantly explored. In the United States, it has been widely used since 1997 after piloting in several children’s medical centers, and now it has also become a common treatment method for femoral stem fractures in children. In recent years, elastic intramedullary pinning has also been widely used for femoral stem fractures in children in China. The principle of elastic intramedullary pin fixation is to maintain the alignment alignment by the pre-curved intramedullary pin acting as a three-point repositioning internal splint in the medullary cavity, reaching the opposite side through the fracture line, cross-fixing the fracture end, and it can eliminate the stress-obstructing factor. It does not interfere with the blood supply to the fracture end, does not destroy the epiphyseal plate and the blood supply to the femoral head, and is conducive to the early activity and functional rehabilitation of the child.